1.6in1 multifunctional monitoring: The 6in1 water quality meter for swimming pools combines six basic functions pH, EC, ORP, chlorine, salinity and temperature measurement to comprehensively analyze the water quality of your swimming pool. The chlorine meter can also monitor spas. It can be used for a comprehensive analysis of the water quality of your center or hydroponic system. 2.Bluetooth connection: Connect the swimming pool residual chlorine meter to your iOS or Android device via Bluetooth to conveniently perform realtime monitoring, data transfer and analysis anytime and anywhere. You can adjust settings such as time format and temperature unit as needed, so you can understand your water quality parameters anytime and anywhere. 3.Data recording and storage The data storage capacity of the monitor is up to 1000 data sets, allowing you to track and analyze historical water parameter data over a certain period of time. Easily monitor changes and trends in water quality for effective maintenance and treatment. The intuitively recognizable digital display is very clear and comes with a clear instruction manual (English language not guaranteed). 4.Userfriendly design: The wireless pool thermometer app is easy to install and use and has a digital display that clearly shows the time as well as indoor and outdoor temperatures. The pool chlorine meter switches between °F/°C and captures maximum and minimum temperatures. It also has high/low temperature alarms that indicate when the desired range is exceeded.